If bullying or harassment is attacked, how to control yourself immediately? And can be freed from that situation?

You can try one thing. Trying to understand the motive. If you can figure out why the bully is bullying, then answering or digesting the words becomes much easier.

Everyone copes differently. In different situations.
How to handle it also depends on who is doing the bullying. Or better yet.
Much depends on the relationship with the bully and the level of bullying.

Friends can bully, cousins in family can bully, siblings can bully, varsity seniors can also bully.
You can grab someone by the collar if needed, if you are a friend you can do more, and if someone like elder brother or cousin bullies you-
No matter how bad the language is, there is no other option but to speak.

In that case
* Responding in an articulate way
* Coldly looking at the smiling face
* According to some, looking between the eyes of the bully, looking at the shoes.
* Giving cold warnings through completely irrelevant words, laughing.
* Complimenting with a smile quite unexpectedly (useful in some cases).
*Reciprocal humiliation through dramatic behavior if there is enough confidence.

These actually depend on the variable mentioned above and which one will be useful.

I myself have been bullied many times in my life, by people close to me. I didn’t admit that I was being bullied.

One thing to keep in mind, (unless it’s an extreme situation) the bully can’t do anything to you as long as you keep your cool.
And if you have any religious moral compass, you will understand that through bullying, the bully is actually committing sin himself.